A silverback gorilla has been caught on camera trying to smash through a window to a room at the Henry Doorly Zoo in Omaha, Nebraska, where a visitor was taking a selfie.

In the incredible video, the man is seen posing for a photo behind a window while Kijito, the 180-kilogram gorilla, watches from afar. Suddenly, the ape breaks into a run, launches itself from a rock and slams himself into the window.

Luckily, the window held strong this time — in April last year, the same gorilla managed to break a glass enclosure.

Strangely, the man looks completely unfazed by the sudden attack. The poor gorilla sits where he had fallen looking ashamed of his inability to break the window.